github-creation-date

Shows the creation date of GitHub repositories on the repository page metadata sidebar.

Versión del día 13/4/2026. Echa un vistazo a la versión más reciente.

Tendrás que instalar una extensión para tu navegador como Tampermonkey, Greasemonkey o Violentmonkey si quieres utilizar este script.

You will need to install an extension such as Tampermonkey to install this script.

Tendrás que instalar una extensión como Tampermonkey o Violentmonkey para instalar este script.

Necesitarás instalar una extensión como Tampermonkey o Userscripts para instalar este script.

Tendrás que instalar una extensión como Tampermonkey antes de poder instalar este script.

Necesitarás instalar una extensión para administrar scripts de usuario si quieres instalar este script.

(Ya tengo un administrador de scripts de usuario, déjame instalarlo)

Tendrás que instalar una extensión como Stylus antes de poder instalar este script.

Tendrás que instalar una extensión como Stylus antes de poder instalar este script.

Tendrás que instalar una extensión como Stylus antes de poder instalar este script.

Para poder instalar esto tendrás que instalar primero una extensión de estilos de usuario.

Para poder instalar esto tendrás que instalar primero una extensión de estilos de usuario.

Para poder instalar esto tendrás que instalar primero una extensión de estilos de usuario.

(Ya tengo un administrador de estilos de usuario, déjame instalarlo)

// ==UserScript==
// @name         github-creation-date
// @namespace    https://github.com/farhandigital/github-creation-date
// @version      1.0.0
// @author       Farhan Digital
// @description  Shows the creation date of GitHub repositories on the repository page metadata sidebar.
// @license      Zlib
// @icon         https://cdn.simpleicons.org/github
// @match        https://github.com/*
// @connect      ungh.cc
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_xmlhttpRequest
// ==/UserScript==

(function() {
var _GM_getValue = typeof GM_getValue != "undefined" ? GM_getValue : void 0;
	var _GM_setValue = typeof GM_setValue != "undefined" ? GM_setValue : void 0;
	var _GM_xmlhttpRequest = typeof GM_xmlhttpRequest != "undefined" ? GM_xmlhttpRequest : void 0;
	var CACHE_PREFIX = "creationDate:";
	function getCached(key) {
		return _GM_getValue(CACHE_PREFIX + key, null) ?? null;
	}
	function setCached(key, value) {
		_GM_setValue(CACHE_PREFIX + key, value);
	}
	var logPrefix = "[github-creation-date]";
	function log(...args) {
		console.log(logPrefix, ...args);
	}
	function isUnghRepoResponse(data) {
		return data !== null && typeof data === "object" && "repo" in data && typeof data.repo === "object" && typeof data.repo.createdAt === "string";
	}
	var INITIAL_BACKOFF_MS = 1e3;
	var failedKeys = new Map();
	function recordFailure(cacheKey) {
		const prev = failedKeys.get(cacheKey);
		const delay = prev ? prev.delay * 2 : INITIAL_BACKOFF_MS;
		failedKeys.set(cacheKey, {
			failedAt: Date.now(),
			delay
		});
		log(`Backoff for ${cacheKey}: next retry in ${delay / 1e3}s`);
	}
	async function getCreationDate(username, repo) {
		const cacheKey = `${username}/${repo}`;
		const cached = getCached(cacheKey);
		if (cached) {
			log(`cache found: ${cacheKey}: ${cached}`);
			return cached;
		}
		const failure = failedKeys.get(cacheKey);
		if (failure !== void 0 && Date.now() - failure.failedAt < failure.delay) {
			log(`Skipping previously failed key (backoff active): ${cacheKey}`);
			return "Unknown";
		}
		const apiUrl = `https://ungh.cc/repos/${username}/${repo}`;
		log("fetching API...", apiUrl);
		return new Promise((resolve) => {
			_GM_xmlhttpRequest({
				method: "GET",
				url: apiUrl,
				onload: (response) => {
					if (response.status !== 200) {
						console.error("GitHub API error:", response.statusText);
						recordFailure(cacheKey);
						resolve("Unknown");
						return;
					}
					try {
						const data = JSON.parse(response.responseText);
						if (isUnghRepoResponse(data)) {
							setCached(cacheKey, data.repo.createdAt);
							resolve(data.repo.createdAt);
						} else {
							console.error("Invalid response data:", data);
							recordFailure(cacheKey);
							resolve("Unknown");
						}
					} catch (error) {
						console.error("Error parsing response:", error);
						recordFailure(cacheKey);
						resolve("Unknown");
					}
				},
				onerror: (error) => {
					console.error("Network error:", error);
					recordFailure(cacheKey);
					resolve("Unknown");
				}
			});
		});
	}
	var formatter = new Intl.DateTimeFormat("en-US", {
		year: "numeric",
		month: "short",
		day: "numeric"
	});
	function formatDate(date) {
		return formatter.format(date);
	}
	var NS = `ghcd_${Math.random().toString(36).slice(2)}`;
	function getTargetElement() {
		const aboutHeadings = document.querySelectorAll(".BorderGrid-cell h2");
		let parentContainer = null;
		for (const heading of aboutHeadings) if (heading.textContent?.trim().toLowerCase() === "about") {
			parentContainer = heading.parentElement;
			break;
		}
		if (!parentContainer) return;
		const readmeElement = parentContainer.querySelector("a[href='#readme-ov-file']");
		if (readmeElement) return readmeElement.parentElement;
		const activityElement = parentContainer.querySelector("a[href*='/activity']");
		if (activityElement) return activityElement.parentElement;
	}
	function createCreationDateElement(creationDate) {
		const container = document.createElement("div");
		container.classList.add("mt-2");
		container.id = NS;
		const creationDateElement = document.createElement("a");
		creationDateElement.classList.add("Link--muted");
		creationDateElement.innerHTML = `<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="mr-2 tmp-mr-2"><path d="M8 2v4"/><path d="M16 2v4"/><rect width="18" height="18" x="3" y="4" rx="2"/><path d="M3 10h18"/></svg> ${formatDate(new Date(creationDate))}`;
		container.appendChild(creationDateElement);
		return container;
	}
	function isAlreadyInjected() {
		return document.getElementById(NS) !== null;
	}
	function injectCreationDate(creationDate) {
		const targetElement = getTargetElement();
		if (targetElement) {
			const creationDateElement = createCreationDateElement(creationDate);
			targetElement.insertAdjacentElement("afterend", creationDateElement);
			return;
		}
		log("Target element not found", targetElement);
	}
	function isGithubRepoPathname(pathname) {
		const notUsername = new Set([
			"settings",
			"topics",
			"organizations"
		]);
		const pathParts = pathname.split("/");
		const pathLength = pathParts.length;
		const username = pathParts[1];
		return !notUsername.has(username) && pathLength === 3;
	}
	function extractUsernameAndRepo(pathname) {
		if (!isGithubRepoPathname(pathname)) return null;
		const parts = pathname.split("/");
		return {
			username: parts[1],
			repo: parts[2]
		};
	}
	var isRunning = false;
	async function main() {
		if (isRunning) {
			log("Already running. Skipping.");
			return;
		}
		log("Starting orchestrator...");
		isRunning = true;
		try {
			if (window.location.hostname !== "github.com") return;
			const pathname = window.location.pathname;
			if (!isGithubRepoPathname(pathname)) {
				log("Not a github repo pathname, skipping...", pathname);
				return;
			}
			if (isAlreadyInjected()) {
				log("Creation date element already exists. Skipping injection.");
				return;
			}
			const repoInfo = extractUsernameAndRepo(pathname);
			if (!repoInfo) {
				log("Failed to extract username and repo, skipping...", pathname);
				return;
			}
			const { username, repo } = repoInfo;
			const creationDate = await getCreationDate(username, repo);
			injectCreationDate(creationDate);
			log(`Repository ${username}/${repo} was created on: ${creationDate}`);
		} finally {
			isRunning = false;
		}
	}
	setInterval(main, 300);
})();